Cartridge for chemical fire-extinguishers



C. GRAAFF.

CARTRIDGE FOR CHEMICAL FIRE EXTINGUISHERS.

APPLICATION FILED MAY 26. 1915. RENEWED SEPT. 24. 1918.

1,888,828. Pa e e y4,1920.

j does not entail any danger of an explosion ing at chemicals containedin it UNIT D STATES PATENT OFFICE.

CLEMENS GBAAFF, OF BERLIN, GERMANY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

CHEMICAL FOUNDATION, INC., A CORPORATION OF DELAWARE.

CARTRIDGE non cnEmcAL rmn-nx'rmeursnnns.

Application filed May 26, 1915, Serial No. 80,665,.

To all whom it may concern Be it known that I, CLEMENS GRAAFF, a subjectof the German Emperor, and resid- 17 Linkstrasse, Berlin, W. 9, Germany,have invented certain new. and useful Improvements in Cartridges forChemical Fire-Extinguishers, of which the following is a specification.

The present invention relates to a cartridge forchemicalfire-extinguishers, which in consequence of a drop or a blow,and with which, when in use, the reaction of the proceeds so calmly,that it is. impossible for the said chemicals or the products of thereaction to be driven out of the container of the extinguisher, and thatgas is generated during the whole period of'operation of theextinguisher, so that the jet of liquid emerging from the latter willhave a constant, reach. The fact that with the cartridge according tothe present invention only gases emerge from it during its operation,renders the saidcartridge suitable for use notonly in fireextinguishe'rs employing a liquid of an composition, but also with theso-called ry extinguishers.

The cartridge is adapted to be positioned within a suitable fireextinguisher casing and contains a chemical or a mixture of chemicalsadapted to produce the gas, in a chamber which'is subdivided by aplurality of perforated partitions. Another chemical or mixture ofchemicals is contained in a capsule, which is displaceably disposed inthe cartridge and is adapted to be opened in a suitable manner, when theextinguisher is operated. This capsule is connected with the lid ofthecartridge in such a manner,

that when the cartridge falls into a position which admits of reactionbetween the several constituents, it will tear a hole in said lid,through which the gases generated may escape, so that the cartridge cannot burst due to an excessive internal pressure.

In the accompanying drawing a preferred embodiment of the presentinvention is. exemplified. v

In this drawing m is a cylindrichl container or vessel, which is closedat one end by a bottom wall '1, and close to its otherend by a lid u.The latter has anopening 2, which is sealed by a lead foil 3 or thelike. Within the cartridge is disposed a Specification of LettersPatent.

Patented May 4, 1920.

Renewed September 24, 1918. Serial No. 255,529.

capsule g, which contains one of the chemicals or a mixture of chemicals'for generating the gas, and these chemicals may, if necessary, beincased in a glass vessel t. The vessel t is supported in a suitable manner, within the capsule g, with the object of avoiding. its beingbroken, if the cartridge should fall or receive a blow, not intended tooperate the cartridge. The capsule 9 1s, furthermore as herembeforestated, displaceable within the cartridge. It is centered in the vesselon by means of scalloped flange disks or teeth 4. A pin 5 connected tothe capsule g passes with a close -joint through the said lead foil 3and is secured in a metal disk 6 the diameter of which is smaller thanthat of the opening 2 in the lid u of the cartridge, so that the lattermay be opened by means of a movable plunger or thelike P, fitted to theextinguisher and entering into the cartridge to displacing the capsuleg. lit the cartridge when in position in a fire extinguisher casingabout the position shown in-the drawing, the capsule Q will, accordingto the force of the impact, either be held unmoved, so that it will notbe opened, or, it will by its kinetic energy break the lead foil 3 bmeans of the pin 5 and the disk 6. Thereby an opening is produced in thecartridge, through which, in case the capsule is unintentionally opened,the gases ma escape into the fire extinguisher casing w ich is adaptedto inclose it without causing any danger.

The capsule g is provided with a neck 8, which is sealed at its upperend by means of alead foil 7 or the like. Into this neck engages a tube9 secured to the bottom 1 of the cartrid e and having holes 8 at itslower end. he neck 8 of the capsule 9 slides in a perforated tube 10,which serves to distribute the chemicals emerging from the capsule, andalso for limiting the stroke of should fall to the ground in v q forwarthereof gradually into the the fire extinguisher, or a movable plungeror the like, P a blow is exerted against the disk 6, whereby the leadfoil 3 s broken. The plun erthereupon pushes the capsule until the tube9 breaks through the lead foil 7 at the upper end of the neck of saidcapsule, penetrates into the interior of the capsule and there breaksthe vessel 8? containing the chemicals. The further displacement ofthecapsule g is then' revented by the edge of tube 10, so that theperforated late 12 will not be covered and closed by t e bottom of thecapsule Q.

The chemical emerging from the capsule g enters into the tube 10 andemerges from the same through the numerous perforations adjoiningchamber, and thence into the other chambers mixing with the chemicalscontained in these chambers. By such means the reaction of the chemicalsacting upon each other in the cartridge for generating the gas proceedsquite calmly, uniformly and so slowly, that on the one hand, no mixingchemicals will be ejected until they have become extinguishingchemicals, and on the other a constant pressure is produced in the firelatter will remain constant from the beginnir ig to the end of itsoperation.

he gas produced by the reaction passes through the annular the wall ofthe capsule g and the wall of the vessel m and through the openin 2 intothe container of the fire extinguis er not shown in the drawin ingdownward and t e thus, travel along whereby the calm gases rising upwardentirely different paths, operation of the cartridge is furthermoreconsiderably im proved.

Chemicals likewise enter from the capsule 9 into the tube 9, containingother chemicals and penetrating into the capsule in operating thecartride. Thus there wil be a chemical reaction in this tube as Well.The gas there produced enters into the ca sule g and facilitates thedischarge of t e chemlcals therefrom.

-I claim: v 1, A cartridge for chemical fire extinguishers having a'reaction chamber, means ividing the reaction chamber of said cartridgeinto a plurality cells or the like.-

2. -A cartridge for chemical fire extinguishers having a reactionchamber, the reaction chamber artitions into a plurality rs, cells orthe like.

3. A cartridge for chemical fire extinguishers of smaller chambers,

of small chamadapted to react on tioned within sair proximity to saidextinguisher, whereby the reach of the space formed between Thechemicals flowsaid subdivided by, perforated having a reaction chamber,means dividing the reaction tridge into a plurality a chemicalcincapsule, chemical positioned within said cartridge and in close chamberand said chemical in the reaction chamber and thereby generates gas,means for limiting the stroke of said capsule, said capsule providedadapted to enter the'reaction' chamber on proximity to said reaction thedlsplacement of said capsule.

4. A cartridge for chemical fire extinguishers having a reactionchamber, means dividing the reaction chamber of said cartridge into aplurality of smaller chambers,

a chemical in said chambers, a displaceable capsule, contalnin anotherchemlcal posireaction chamber and adapted to react on said chemical inthe reaction chamber and thereby generate gas, means for limiting thestroke of said capsule, said capsule provided with a neck,

adapted to enter the reaction chamber on of-said capsule, a tube atthedisplacement tach'ed to said reaction chamber adapted to penetrate intothe capsule on the displacement of the latter, said tube containing thea displaceable with a neck,

cartridge and in close first chemical and adapted to receive a part ofthe chemical contained in the capsule.

5. A cartridge for chemical fire extinguishers having a reactionchamber, means dividing the reaction chamber of said cartridge into aplurality of smaller chambers, a chemical in said chambers, capsule,containing another chemical posie tioned within said cartridge and inclose proximity to said reaction chamber and adapted to react on saidchemical in the reaction chamber and thereby generate gas, means forlimiting the strokerof, said ca sule, said capsule provided with a'neck, adapted to enter the reaction chamber on the displacement of saidcapsule, a tube attached to said reaction chamber, adapted to penetrateinto the capsule on the dlsplacement of the latter,.sa1d tube containingthe first chemicaland adaptedto receive 'a part of the chemicalcontained-in the capsule, said capsule attached to the lid of'thecartridge, a'readily broken seal in said lid, the capsule adapted tobreak said seal, in

a displaceable I case the cartridge should drop or receive a blow.

In testimonfy whereof I aflix my signature in presence 0

